Gong door-bell



(No Model.)

B. R. BUEHLER.

GONG DOOR BELL.

No. 324,915. Patented Aug. 25, 1885.

N. PETERS, Phnmmhn m hur. Washinglen. n. cy

UNTTEE STATES PATENT OFFICE.

RUDOLPH ROBERT BUEHLEP, OF PHILADELPHIA, PENNSYLVANIA.

GONG DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 324,915, dated August25, 1885.

Application filed April 27, 1885. (No model.)

To aZZ whom it may concern.-

Be it known that I, RUDOLPH ROBERT JUEHLER, a citizen of the UnitedStates, re-

siding at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inDoor-Bells or Gongs; and I do hereby de clare the following to be afull, clear, and exact description of theinvention, reference being hadto the accompanying drawings, which form part of this specification, inwhich Figure l is an elevation, the gong being shown in dottedliues.Fig. 2 is aperspective of hammer-plate. Fig. 3 is a detail perspectiveof pull-lever inverted.

My invention has relation to double-stroke doorbells, and myimprovements have for their object to provide a construction which willinsure a second or return stroke of the hammer with as much certaintyand force as the first stroke. In double-stroke bells, as heretoforeconstructed, there has been a tendency to miss on the return or backstroke or to make a fainter stroke than on the forward movement, owingto the fact that the bellhandle will frequently be held onto and atlowed to return slowly by the person ringing after pulling said handle,instead of letting go completely of the same. By my inventi 11 there isprodded a construction which will produce a quick, firm, and decidedstroke on the back-stroke of the hammer, as well as on the forwardstroke, no matter how slowly the bell-handle be allowed to return to itsnormal position.

My improvements consist in the peculiar construction and combinations ofparts hereinafterdescribed and specifically claimed, having referenceprineipally to the combination, with the bellhammcr and lever for movingthe same, of an intermediate plate, to which said hammer is secured andwith which said lever engages, and a spring attached by its ends to saidplate and the base-plate or bracket of the bell, respectively, ashereinafter set forth.

liet'erriug to the accompanying drawings, A indicates the bracket orbase-plate having a post, B, onwhich the hell or gong C is mounted inthe usual or any suitable manner.

D is the bell-hammer, and E the lever by which the same is operated,said lever having holes 0 e e for the attachment of the bell-wire,

, l l l l f I l whose other end is to be secured to a proper handle orpull.

G is the check or retracting spring, one end of which is secured to apost, a, on the baseplate A, the other end engaging with one of thehooks c c on said lever. Two or more of these hooks are provided foradjusting purposes and to regulate the tension of the checkspring.

The hammer D is secured to plate F, which is swiveled on a pintle, H, onwhich the lever E is also pivoted, said pintle entering an openingin aboss, a, on the base-plate A. The movement of the lever E and plate F ontheir pin tle H is limited by a projection, a arising from thebase-plate A, the shoulders 0 c and ff on said leverE and plateF,respectively,abutting alternately against the edges of said projectionwhen said lever and the hammer are moved. The plate F has on its upperside a stud or projectiou, which enters a segmental recess, 6'', in theunder side of lever E, and has playspaee between the shoulders or ends 00 of said recess.

I is a coiled spring, with its ends prolonged and bent, the endtentcring an openingin the base-plate A, and the other end, i, enteringan openin g, f, in the plate F. Thecenter of movement of this spring isits end 1', and it is in a state of tension or compression when a linedrawn through its ends passes through the middle of post .13 and pintleH, or when in the position shown in dotted lines in Fig. 1. As it passesthis center line its tendency is to throw forward the hammer I) andplate F in the direction of its movement, whichever way that directionbe, either forward or backward. Its normal position is to one side ofthe center, or, as shown in Fig. 1, to the left of the pintle II. Now,on pulling the lever E in the direction of the arrow and against theforce of the checkspring G, the shoulder ot recess 6 bears against thestud j on the plate F and causes said plate to turn on the pintle H,carryin g the hammer forwardly and compressing or producing tension inspring I. The instant the end z" of spring I passes the center linedescribed it finds relief by moving the plate F until its stud/" meetsthe shoulder c of recess 0 thus giving the forward stroke of the hammer.On the return motion of the lever, due to the tension or retraetileexertion of the check-spring G, the shoulder e bears against proj ectionand moves the pl ate F backwardl y, causing spring I to again cross thedescribed center line, but in the reverse direction from whatit didbefore. As it passes said center it throws the plate F, and with it thehammer I), in the direction of its movementt-hat is, back\vardI v--th usgiving the back-stroke, the projection f moving from shoulder 6 toshoulder 0. As this action of the spiing I occurs whenever it passes itscenter, as described, it follows that, no matter how slowly the lever bemoved, either forwardly or backwardly, the hammer will give a quick andfirm stroke and that two strokes Will be made for every oscillation ofthe lever or each pull of the bellhandle. i

Vhat I claim as my invention is as follows: 1

1. In a bell-stroke movement, the combination, with lever E, havingshoulders e of 20 plate F, having proj eetionf and spring I,substantially as shown and described.

2. The combination, With base-plate or bracket A, of hammer D, lever E,having shoulders c 0 plateF, having projection f 25 pin tle H,check-spring Gr, and stroke-spring I, said several parts being combinedand constructed for operation substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this23d day of April, 1885.

RUDOLPH ROBERT BUEHLER.

\Vitnesses:

JOHN KoEBEnnF',

OHAs. ROTH.

